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Diffstat (limited to 'drivers/clk/bcm/clk-bcm2835-aux.c')
-rw-r--r--drivers/clk/bcm/clk-bcm2835-aux.c71
1 files changed, 71 insertions, 0 deletions
diff --git a/drivers/clk/bcm/clk-bcm2835-aux.c b/drivers/clk/bcm/clk-bcm2835-aux.c
new file mode 100644
index 0000000000..0fafa5cba4
--- /dev/null
+++ b/drivers/clk/bcm/clk-bcm2835-aux.c
@@ -0,0 +1,71 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * Copyright (C) 2015 Broadcom
+ */
+
+#include <linux/clk.h>
+#include <linux/clk-provider.h>
+#include <linux/io.h>
+#include <linux/module.h>
+#include <linux/platform_device.h>
+#include <dt-bindings/clock/bcm2835-aux.h>
+
+#define BCM2835_AUXIRQ 0x00
+#define BCM2835_AUXENB 0x04
+
+static int bcm2835_aux_clk_probe(struct platform_device *pdev)
+{
+ struct device *dev = &pdev->dev;
+ struct clk_hw_onecell_data *onecell;
+ const char *parent;
+ struct clk *parent_clk;
+ void __iomem *reg, *gate;
+
+ parent_clk = devm_clk_get(dev, NULL);
+ if (IS_ERR(parent_clk))
+ return PTR_ERR(parent_clk);
+ parent = __clk_get_name(parent_clk);
+
+ reg = devm_platform_ioremap_resource(pdev, 0);
+ if (IS_ERR(reg))
+ return PTR_ERR(reg);
+
+ onecell = devm_kmalloc(dev,
+ struct_size(onecell, hws,
+ BCM2835_AUX_CLOCK_COUNT),
+ GFP_KERNEL);
+ if (!onecell)
+ return -ENOMEM;
+ onecell->num = BCM2835_AUX_CLOCK_COUNT;
+
+ gate = reg + BCM2835_AUXENB;
+ onecell->hws[BCM2835_AUX_CLOCK_UART] =
+ clk_hw_register_gate(dev, "aux_uart", parent, 0, gate, 0, 0, NULL);
+
+ onecell->hws[BCM2835_AUX_CLOCK_SPI1] =
+ clk_hw_register_gate(dev, "aux_spi1", parent, 0, gate, 1, 0, NULL);
+
+ onecell->hws[BCM2835_AUX_CLOCK_SPI2] =
+ clk_hw_register_gate(dev, "aux_spi2", parent, 0, gate, 2, 0, NULL);
+
+ return of_clk_add_hw_provider(pdev->dev.of_node, of_clk_hw_onecell_get,
+ onecell);
+}
+
+static const struct of_device_id bcm2835_aux_clk_of_match[] = {
+ { .compatible = "brcm,bcm2835-aux", },
+ {},
+};
+MODULE_DEVICE_TABLE(of, bcm2835_aux_clk_of_match);
+
+static struct platform_driver bcm2835_aux_clk_driver = {
+ .driver = {
+ .name = "bcm2835-aux-clk",
+ .of_match_table = bcm2835_aux_clk_of_match,
+ },
+ .probe = bcm2835_aux_clk_probe,
+};
+builtin_platform_driver(bcm2835_aux_clk_driver);
+
+MODULE_AUTHOR("Eric Anholt <eric@anholt.net>");
+MODULE_DESCRIPTION("BCM2835 auxiliary peripheral clock driver");